Method of making a refractory brick



Aug. 13, 1968 w. J. THOMAS, SR

METHOD OF MAKING A REFRACTORY BRICK 5 Sheets-Sheet 1 Original Filed Feb.8, 1965 KL M 14 '26 24 28 LJJALTEQ. J. TQoMns SR.

g 1968 w. J. THOMAS, SR

METHOD OF MAKING A REFRACTORY BRICK 3 Sheets-Sheet 2 Original Filed Feb.8, 1965 LURLT-ERJ.THOMAS, S2.

ATTORNEYS 1968 w. J. THOMAS, SR 3,396,453

METHOD 0F MAKING A REFRACTORY BRICK Original Filed Feb. 8, 1965 5 h etshet 5 5 'Z SO $16.17

230 '234 INVENTOR 242 111mm J. THOMAS, SR.

ATTORNEYS United States Patfifl 3,396,453 METHOD OF MAKING A REFRACTORYBRICK Walter J. Thomas, Sr., Plymouth Meeting, Pa., assignor, by mesneassignments, to International Minerals & Chemical Corporation, Skokie,Ill., a corporation of New York 1 Continuation of application Ser. No.478,515, Sept. 8, 1965, which is a division of application Ser. .No.430,865, Feb. 8, 1965, now Patent No. 3,242,889, which is acontinuation-in-part of application Ser. No. 232,953, Oct. 25, 1962.This application Sept. 8, 1967, Ser. No.

1 Claim. (Cl. 29- 421) ABSTRACT OF THE DISCLOSURE More particularly, theinvention relates to method of applying a suspension tab and a headedpin to a refractory brick, and includes supporting the refractorymaterial in a forming mold, inserting the pin through a hole in the tab,magnetically supporting the tab and head of the pin against the flatface of a ram wherein the tab is parallel to the face of the refractorymaterial and then driving the tab and pin toward and against therefractory material and forcing the pin into the refractory material andpressing the tab against the surface thereof.

This application is a continuation of Ser. No. 478,515 which is adivisional application of Ser. No. 430,865 filed Feb. 8, 1965 now PatentNo. 3,242,889 which is a continuation-in-part of Ser. No. 232,953 filedOct. 25, 1962 now abandoned.

This invention relates to improvements in refractory bricks, such as areemployed in the construction of refractory furnace roofs and whereinsuch refractory bricks have comolded therewith, metallic surface plates.

Refractory bricks of the type above referred to are conventionallyprovided with means joined to the surface plate, for attaching thebrick, in the construction of a furnace roof, to an overhead support.Such attaching means is conventionally joined, as by welding, to one ofthe surface plates at one end of the brick, and is in the form of a tabhaving a portion thereof joined to a face of the surface plate andhaving the remaining portion formed at an angle and embedded in the endof the brick material, whereby it is necessary that this embeddedportion be bent outwardly to extend longitudinally of and from the endof the brick, when the brick is to be placed in position in the roofstructure, the outwardly bent portion being formed with a suitable holeor opening for facilitating the hanging of the brick in position.

The present invention has for a particular object to provide, inassociation with a refractory brick having comolded metallic surfaceplates, an improved hanging or supporting tab which is attached to thesurface plate in a manner whereby the tab can be readily shifted byswinging or sliding, or may be readily attached to the brick, at thetime of its being put into use, into operative position, without bendingor otherwise deforming the supporting tab.

Another object of the invention is to provide a novel method of applyinga supportingtab to a refractory brick and the surface plate secured toone face of the brick, whereby the tab is anchored not only to thesurface plate, but to and in the refractory material of the brickitself, so that a strong supportingconnection is established between thesupporting tab and the brick.

Still another object of the invention is to provide a method ofmanufacturing a refractory brick with a supporting tab therefor, whereinthe supporting tab is securely attached to the body of the brick by aheaded pin member which extends through the surface plate and is driveninto the refractory material of the brick during the operation ofmolding and pressing the brick.

A still further object of the invention is to provide a novel means ofpinning a supporting tab to a surface plated refractory brick bysupporting the tab together with the anchoring pin therefor by amagnetic ram or by magnetic means forming a part of a ram, which holdsthe surface plate, the tab and the anchoring pin in a suitable positionfor applying the plate to the brick and forcing the pin into the brickmaterial and comolding the plate therewith and indenting the tab intothe outer surface of the surface plate, whereby when the brick is readyfor us the tab may be shifted with respect to the surface plate to bringa portion-of the tab into a position where it extends beyond theadjacent end of the brick body and which projecting end portion of thetab is apertured to facilitate the attachment of the tab to a supportingstructure.

Still another object of the invention is to provide a novel means ofpinning a supporting tab and surface plate to a refractory brick andsimultaneously introducing an anchoring pin into the body of the brick,by supporting the plate, tab and anchoring pin by magnetic means againstthe under surface of a ram which presses the plate and the pin into thebrick material while the latter is in a mold, thereby comolding theplate and the refractory brick and also, and simultaneously whilepressing the plate and pin into the brick material by the ram, effectingthe formation of a circular depression in the plate and pressing the pinattached end of the tab into such depression whereby the pin engaged endof the tab may be rotated in the depression to facilitate the extensionof the opposite end of the tab to an outwardly extended operativeposition with respect to the body of the brick.

A further object is to provide a means of attaching a surface coveringplate, a supporting tab and an anchoring pin to a refractory brick bodyin a manner whereby the pin attached end portion of the tub and adjacentportion of the plate will be inset from the plane of the outer surfaceof the remainder of the plate whereby the head of the anchoring pin forthe tab will not project beyond the said plane of the plate and will notinterfere with the placement of a Side of another brick flat against thesurface of the plate.

In one embodiment of the invention, the brick supporting tab is securedadjacent to one end by an anchoring pin which is driven into therefractory material of the brick and which pin has a head which engagesthe outer surface of the tab and when the brick is being put intoposition the workman merely elevates or raises the other end of the taband rotates the tab around the pin to bring it to a position wheresubstantially half of the tab extends beyond the adjacent end of thebrick body.

In another embodiment of the invention the anchoring pin is set in thebrick body with the head thereof spaced slightly from the surface of thesurface or jacket plate and the supporting tab is provided, adjacent toone end thereof, with a key-hole slot whereby the inner end of the tabcan be readily locked to the pin with the opposite end portion of thetab, carrying a suitable hole or opening, extending beyond the adjacentend of the brick.

It is also contemplated to provide a brick with the supporting orsuspending tab retained in place by a headed pin having its shankembedded in the brick material and the head end extending through astraight slot formed in the inner end portion of the tab, which slotpermits the tab to be shifted longitudinally from an inoperative to anoperative position.

Other objects and advantages of the invention will be come apparent asthe description of the same proceeds and the invention will be bestunderstood from a con- 3 sideration of the following detaileddescription taken in connection with the "accompanying drawings,wherein:

FIG. 1 is a view illustrating diagrammatically one procedure forattaching a suspension tab to the refractory brick by means of a notchedpin and while the brick material is in the mold.

FIG. 2 is a view in perspective of a brick showing the suspension tab inthe inoperative position.

FIG. 3 is a sectional view on an enlarged scale taken substantially onthe line 33 of FIG. 2 through a portion of the brick and illustratingthe manner in which the shank portion of the attaching pin is embeddedand locked in the brick material.

FIG. 4 is a view in perspective of the tab end of the brick showing thetab swung into operative position.

FIG. 5 is a perspective view of the tab end of the brick showing anothermanner of attaching the tab and showing the tab in operative position.

FIG. 6 is a sectional view on an enlarged scale taken substantially onthe line 6-6 of FIG. 5 through a portion of the brick and the attachedelements.

FIG. 7 is a view in perspective of the tab end of the brick showinganother form of slotted tab.

FIG. 8 is a sectional view taken substantially on the line 88 of FIG. 7through a portion of the brick structure.

FIG. 9 is a view in perspective of the tab end of a brick showing theattachment of the tab by means of a key-hole slot engaging the pin.

FIG. 10 is a sectional view on an enlarged scale taken substantially onthe line 10-10 of FIG. 9 through a portion of the brick.

FIG. 11 is a perspective view illustrating the separated relation of theplated brick body and the key-hole slotted tab preparatory to attachingthe tab to the pin.

FIG. 12 is a view in perspective of an end of a brick and illustratingthe attachment of the suspension tab by a headed pin engaging in alongitudinal slot in the tab.

FIG. 13 is a sectional detail similar to FIG. 3 and showing anotherstyle of anchoring pin.

FIG. 14 is a view corresponding to FIG. 1 and illustrating anotherembodiment of the invention and the manner of applying the plate, taband pin to a refractory brick.

FIG. 15 is a view in perspective, on a smaller scale, showing the endportion of a brick with the tab, pin and plate applied in accordancewith the showing of FIG. 14.

FIG. 16 is a sectional view taken substantially on the line 16--16 ofFIG. 15, the view being on an enlarged scale.

FIG. 17 is a view corresponding to FIG. 15 but showing the tab swung tooperative position.

FIG. 18 is a view illustrating the bottom part of the 'ram structurewith the mold shoe applied thereto and the top or outer surface of thebrick facing plate with the tab and pin assembled ready for placementagainst the bottom of the ram to be held in position by the magnets.

Referring now more particularly to FIGS. 1 to 3 inclusive, there isillustrated, in FIG. 1, diagrammatically, one method of fixing a tab andpin to a plated brick while the latter is in the forming mold.

In this diagrammatic figure the numeral 10 generally designates aforming mold in which there is shown the basic refractory brick material12. The'metallic surface plates to be molded therewith are designated 14and 16.

The brick is formed by comolding the metallic plates with the refractorymix 12 and applying pressure through the plates. This is conventionalprocedure and also it is conventional to form the plates with struck outanchor prongs 18 which are pressed into the refractory material forestablishing a locking connection between the plates and the finishedbrick.

The numeral 20 generally designates a ram or pressing unit which is inthe form of a magnet and which may be either a fixed magnet or anelectro magnet as desired.

This magnet unit 20 may be supported in a suitable mannerfor movementtoward the brick material for pressing or forming the brick andcomolding the plate 14 therewith and for simultaneously aflixing the taband attaching pin in position against the plate with the pin shankextended into the body of refractorymaterial.

The brick suspension tab, in one form thereof, is designated 22.Adjacent to one end the tab is provided with the pin receiving opening24 while adjacent to the other end there is formed a larger opening 26which is provided for facilitating attaching the tab to a mountingstructure.

The attaching pin is designated 28.

The pin 28 is provided through its length with transverse notches 30 andat one end is headed as indicated at 32.

In applying the plate, pin and suspension tab to the brick while thelatter is in the mold form, they are held above the brick material bythe underside of the magnet unit, against which they are positioned asillustrated and while so held, the magnet is lowered to function as aram for forcing the pin 28, which extends through an opening 34 in theplate, to penetrate into the refractory material 12. The force appliedby the ram magnet may be such as to produce in the plate 14 anindentation as shown at 36 which is in the form of the suspension tab.

FIG. 2 shows the completed refractory brick which is here generallydesignated 38, as distinguished from the mass of refractory material 12in the form 10.

As will be readily understood from the showing of FIG. 1 the attachingtab and pin are positioned by the ram magnet so that when the tab andpin are applied against the plate 14, the transverse end edge of thesuspension tab adjacent to the pin will lie substantially flush with theadjacent transverse end edge of the plate 14 while the opposite end ofthe tab is disposed inwardly. Consequently, in the finished brickstructure the complete straight tab will lie entirely against the faceof the plate 14 with no part of the tab projecting beyond the end edgeof the finished brick body.

For convenience of description, the end of the suspension tab 22 throughwhich the pin 28 extends, may be defined as the secured end and isdesignated 22a while the opposite end, adjacent to which the opening 26is located, may be defined as the free or unsecured end, and isdesignated 22b.

In addition to the formation of the shallow indentation 36 in the fulllength of the suspension tab 22, by the force of application of thesuspension tab to the plate, it will be seen upon reference to FIG. 3that the plate 14 around the opening 34 will be depressed as indicatedat 40, and also the suspension tab around the opening 24 thereof will bedepressed or dimpled inwardly as indicated at 42 and at the free end2217 of the suspension tab the middle of the plate 14 will be shaped asa shallow outwardly extending button 44, by the opening 26 of thesuspension tab.

When the refractory brick 38 is to be placed in hanging position for usein a furnace structure the workman needs only to raise the free end 22bof the tab from the indentation 36, which operation can be easilyaccomplished due to the relative thinness and flexibility of the metaltab, and then rotate the tab around the'securing pin 28 to the positionillustrated in FIG. 4. Since the pin 28 is inserted into the brickadjacent to an end thereof it will be seen that a substantial portion ofthe tab can be positioned to extend freely from the adjacent end of thebrick body. Thus with the present invention the tab is readily fixed inits straight, flat and unbent condi tion to the surface plate of thebrick and to the body of the brick and it will remain lying through itsfull length against the plate 14 until it is ready for use, whereupon itcan be easily shifted to the position shown in FIG. 4.

It will also be apparent that after'the tab has been raised at its innerend from the depression 36 ands Wong to its working position as shown inFIG. 4 it will reseat itself in the outer end portion of the depression36 and thus be held against displacement, thereby facilitating theoperation of mounting the brick in position in association with otherbricks of a furnace roof structure.

The top "surface ofthe head of the pin lies substantially the plane ofthe face of the tab and the surface portion of the plate 14 lyingoutside of the depression 36.

In FIGS. 5 and 6 there is illustrated a slight modification of thesuspension tab wherein the tab, here generally designated 46, whenapplied against the surface of the facing plate 48 is not indented intothe facing plate but bears against the surface thereof. In this form thefacing plate 48 is shown slightly raised as at 50, around the pinopening 52 and the material of the refractory brick 54 becomes pressedinto the underside of the raised portion 50, as shown in FIG. 6 when thetab 46 is pressed thereagainst and the pin 56 is forced into the brickmaterial.

The tab 46 likewise is formed with a slight outwardly projecting orraised portion 58 around the pin opening 60. Thus it will be seen thatthe two outwardly projecting and interengaged portions 50 and 58 of theplate 48 and 46 respectively when tightly frictionally engaged onewithin the other will hold the suspension tab in its initial positionlying full length against the outer surface of the plate 48 and alsoholds the tab when it is rotated to the working position in which it isshown.

In FIGS. 7 and 8 the numeral 62 designates a refractory brick havingsecured to a face thereof the surface plate 64. In these figures thesuspension tab is generally designated 66 and this tab is attached bythe pin 68 to the body of the brick in a similar manner to the tab 22,the attaching pin 68 passing through the attached end of the tab intothe brick material as illustrated in FIG. 8, but in this case theattaching tab is shown lying against the face of the plate 64.

The attaching tab 66 also differs from the tab 22 in having the elongatehanger slot 70 therein which is widened out or enlarged at the endthereof adjacent to the free end of the suspension tab, as indicated at72.

FIGS. 9 to 11 inclusive illustrate another embodiment of the inventionwherein the suspension tab is formed to be applied to the finishedrefractory brick, as the latter is put into use, and in this embodimentof the invention the pin and tab may be applied by the magnetic ram ashereinbefore described or the pin may be inserted through a suitableopening in the metallic surface plate and embedded in the body of thebrick with the surface plate formed with or without a depression forreceiving an end portion of the suspension tab, and the suspension tabformed as a separate unit to be applied to the brick as needed.

In these last mentioned figures, the numeral 74 generally designates therefractory brick having molded to the face thereof the metal surfaceplate 76.

The plate 76 is illustrated as having the shallow depression 78 formedtherein and extending to the adjacent end edge of the plate and thebrick. Adjacent to the said end edge there is fixed in the body of thebrick the headed pin 80 which passes through the plate 76 in the recessarea thereof and which has the underside of the head 82 spaced slightlyfrom the surface of the plate.

Numeral 84 generally designates the suspension tab which is formed forapplication to the pin 80.

The tab 84 is provided with the key-hole slot 86. As shown the key-holeslot is disposed upon the longitudinal center of the tab and is locatedadjacent to the attached end of the tab, which end is designated 84a andis also positioned with the narrow end portion 86a of the slot nearestto the end edge 84a. The larger opening or larger end of the slot,designated 86b is of a size to have the head 82 of the pin passtherethrough while the narrow portion 86a of the slot is of a width tosnugly receive the body of the pin beneath the head.

The opposite or free end of the tab is provided with an opening 88 whichin this case is of circular form like the opening 26. However, it is tobe understood that these openings are not limited to any specific form.

In the use of the brick and suspension tab shown in FIGS. 9 to 11, itwill be apparent that when the brick is to be put into position, theworkman takes the tab and inserts the head 82 of the pin through thelarge opening end of the key-hole slot and then pulls the tab outwardlyso as to draw the pin tightly into the narrow portion of the slot. Inthis operation the attached end of the tab will ride in the shallowrecess 78. It will also be apparent, however, that this same means ofattaching the tab 84 to a brick may be employed without providing plate76 with the depression or recess 78, in which case the tab would lie onand parallel with the surface plate.

It will be seen in FIG. 10 that the pin illustrated is the same as thatshown in previous figures where the body of the pin is provided withnotches to more firmly bond it in the material of the brick.

FIG. 12 illustrates still another form of the invention. In this form,the brick is generally designated 90 and the surface plate is designated92.

The surface plate has extending therethrough and embedded in the body ofthe brick, the pin 94, the head of which is spaced from the surface ofthe plate 92 a distance approximately equal to the thickness of thesuspension tab which is here generally designated 96.

In this embodiment of the invention shown in FIG. 12 the suspension tabhas a straight slot 98 formed therein adjacent to the inner or attachedend of the tab and in which the pin 94 is engaged. Thus it will be seenthat the suspension tab is permanently attached to the brick but may beslid outwardly for use. In the application of the tab to the brick,together with the pin 94, use may be made of the magnet ram shown inFIG. 1 and described in connection with the tab 22 and pin 28.

It will also be seen that in FIG. 12 the suspension t-ab lies upon thesurface of the plate 92. However, it may be depressed into a shallowrecess if desired whereby turning or rotation of the plate on the pin 94will be prevented when the tab is drawn outwardly for use.

FIG. 13 illustrates another form of attaching pin which may be used forconnecting any one of the described suspension tabs to the brick body.This modified attaching pin is generally designated 100 and, as shown,the shank thereof is formed with the longitudinal slit 102 which opensthrough the inner end of the shank, while the outer end of the shank hasa head 104 as in the first described pin 4.

A portion of a refractory brick is illustrated in FIG. 13 and designated106 and there is also shown here a portion of a surface plate 108 and aportion of an overlying suspension tab 110. As illustrated in this lastmentioned fi ure, the suspension tab and the surface plate are depressedslightly as at 112 and 114 respectively and the depression 112 receivesthe head 104 of the pin. However, this is only one phase of theconstruction and it will be readily apparent that this pin 100 may beused effectively in connection with any one of the other illustratedsuspension tabs.

Referring now to FIGS. 14 to 18 inclusive, another embodiment of theinvention is illustrated wherein a modified plate and tab constructionemployed together with another design of magnetic ram for applying theplate, tab and pin to a brick body.

In FIG. 14 the numeral 200 generally designates the forming moldcorresponding to the mold 10, in which the refractory brick material 202is placed to receive the metal surface or cladding plate.

The ram structure, corresponding to the ram 20, is here designated 204and may comprise a body portion 206 to the underface of which is securedthe sole plate 208.

This sole plate is, of course, of proper dimensions to enter the mold200 for compressing the refractory material 202.

The numeral 210 designates magnets which are recessed in the body 286and secured in place by suitable means such as the screws 212. Thesemagnets are of a type which is commercially available and embody twopoles separated by a non-magnetic material as illustrated and, beingcommercially available, it is not believed that a more detaileddescription of the same is required. The magnets which may be two ormore in number are disposed preferably in a longitudinal line in thebody and extend through apertures 214 in the sole plate 208 and havetheir exposed surfaces or faces flush with the exposed face of the soleplate as illustrated.

The sole plate 208 may be attached or secured to the underface of theram body 206 by any suitable means, the means here illustratedcomprising screws 216 as shown in FIG. 18.

Fixed to the face of the sole plate 208 at one end thereof is a heelplate 218. This heel plate has an aperture 220 therein which is locatedon the longitudinal center line of the sole plate.

Opposite sides of the heel plate 218 are curved as indicated at 222.These curved sides are formed on the same are struck from the center ofthe opening 220 and at the adjacent end edge of the sole plate theyintersect the straight edge 224 which is flush with the adjacenttransverse edge of the sole plate, and at their opposite ends theyintersect a straight bevel edge 226 which is parallel with the edge 224as shown.

The heel plate 218 may be attached to the face of the sole plate byWelding or other means, the means here illustrated being the screws 228.

The face plate or surfacing plate to be applied to the refractory brickis generally designated 230. This plate is formed with a series ofcurved prongs or anchors 232 which are struck from the plate as shownand which may be placed in any desired arrangement. In the arrangementhere shown the prongs are disposed in two longitudinal lines and areforced into the refractory material by means of the ram 204 in the samemanner as the prongs 18 carried by the hereinbefore described plate 14.

The hanger tab to be attached to the plate 230 is designated 234 and isin the form, initially, of a straight flat strip as shown in FIG. 18.

Adjacent to one end the tab 234 is provided with a suitable opening 236to receive the shank portion 238 of the anchor pin 240 which has a fiathead 242. The opening 236 is somewhat larger than the shank of theanchor pin whereby the pin shank can be easily dropped through theopening and will remain perpendicular to the tab and to the plate 230,the plate 230 also having the opening 244 therein to receive the pinshank as shown in FIGS. 14, 16 and 18.

The centers of the openings 236 and 244 in the tab and in the plate 230respectively are spaced the same distance from the transverse end edgesrespectively of the plate and of one end of the tab so that when the tabis placed in its initial or starting position against the outer face ofthe plate 230 as shown in FIG. 18 the transverse end edges of the plateand tab will be flush with one another.

The center of the opening 220 in the heel plate is spaced the samedistance from the edge 224 of the heel plate as the centers of theopening 236 and 244 are spaced re spectively from the tab and face plate230.

The end of the tab 234 opposite from the pin 240 has the relative-1ylarge opening 246 formed therein to facilitate the hanging of the brickwhen the tab is rotated to its outwardly extended or operative positionas shown in FIG. 17.

In the operation of comolding the plate 230 with the brick, the faceplate 230, the suspension tab 234 and the pin 240 are assembled asillustrated in FIG. 18 and placed against the pressure face of the soleplate 208 with the head 242 of the pin located in the aperture oropening 220 of the heel plate as illustrated in FIG. 14.

The magnets 210 will hold these parts in assembled relation, such partsbeing formed of steel and accordingly readily attracted by the magnet.

It will be seen upon reference to'FIG. 18 that the width of the heelplate 218 is greater than the width of the tab whereby the portions ofthe heel plate which extend beyond the ends of the parallel edge 224 and226 will project beyond the sides of the tab, the length of theseparallel edges being approximately the same as the width of the tab.

With the assembly secured to the face of the; ram, when the ram islowered to press the'brick material and to force the prongs 232thereinto and also to force the pin into the brick material togetherwith the face plate 230, the heel plate 218 will form a depression orrecess in the face plate as indicated at 248 and the end of the tabthrough which the anchor pin 240 extends, will likewise be bent ordepressed into the recess, the beveled edge 226 of the heel platebending the tab along the transverse line as indicated at 250.

The head 242 of the anchor pin will, of course, remain with theunderside resting against the surface of the tab but the top surface ofthe head will be substantially in the same plane as the face or outersurface of the plate 230 in the area lying outside of the recess 248. i

It will be seen from the foregoing that the rounded outer edge portions222 of the heel plate in forming the corresponding rounded sides of therecess 248, will provide clearance for the corners of the tab forturning or rotating the tab from the inwardly projecting or extendingposition shown in FIG. 15 to the outwardly extending or projectingoperative position shown in FIG. 17. Also, the body of the tab in theportion lying between the transverse bend 250 and the end having theaperture 246 therein, will also be pressed into the face of the plate230 whereas a small portion of the plate 230 will be caused to bulgeoutwardly into the opening 246 forming the button 252.

The longitudinal recess or depression which the pressure applied to theinner end portion of the tab causes the tab to form in the face plate230, is designated 254.

From the foregoing it will be apparent that there is provided by thepresent invention a new and novel refractory brick structure andsuspension means therefor wherein, in order to put the brick into use,no bending or other physical deformation of the suspension tab isrequired. The tab in all instances is madeas a straight strip of metaland lies against a face of the surface plate and is readily shiftedeither by longitudinal sliding or by rotation in a plane parallel withthe surface plate, to bring a substantial free end portion of the'tabinto a position where it projects beyond the adjacent end of the brick,where it is ready for instant use.

As this invention may be embodied in several forms without departingfrom the spirit or essential characteristics thereof, the presentembodiment is therefore illustrative and not restrictive, since thescope of the invention is defined by the appended claim rather than bythe description preceding it, and all changes that fall within the metesand bounds of the claim or that form its functional as well asconjointly cooperative equivalents, are therefore intended to beembraced by this claim. I

I claim:

1. The method of applying a suspension tab'havin'ga support engagingOpening in one end thereof'a'nd a separate headed pin of magnetizablematerial to a-refractory brick and simultaneously comolding a separatemetal surface plate on one side face thereof, which comprises supportingthe refractory material in an open top forming mold to present a flatupper surface forming an opening in said metal surface plateadjacentoneedge thereof, forming an opening in said suspension vtabadjacenttheother end edge thereof, placing saidtab on saidplate with said one endedge thereof substantially coinciding with the said end edge of theplate and said formed openings thereof in alignment, inserting the pinthrough aligned openings in the tab and surface plate in assembledrelation, magnetically supporting the surface plate, tab, and pin in theassembled relation above the forming mold and against a ram with the taband head of the pin in direct contact with the ram and platesubstantially parallel with the upper surface of the material in theforming mold and with the pin suspended by its head through the openingin the plate and tab and extending downwardly therefrom, and thendriving the plate, tab, and pin downward and against the refractorymaterial in said forming mold and thereby comolding the plate and brickwith said end edge of the plate coinciding with an end edge of therefractory material in said forming mold and forcing 10 against thesurface of the plate with sufficient pressure to substantially entirelyembed the tab within the outer surface of the plate and to bulge aportion of the plate into the support engaging opening in the tab toprovide means for locking the tab in inoperative or storage position.

References Cited UNITED STATES PATENTS 1,299,232 4/1919 Rosenburg 29-5261,177,738 4/1916 Thomson 29256 2,652,793 9/1953 Heuer et al 264-60 XROBERT F WHITE, Primary Examiner.

the pin into the refractory material and pressing the tab 15 K. J.HOVET, Assistant Examiner.

